Expression of TFAP2α isoforms. (A) Expression of TFAP2α isoform 1, 2 and 3 in advanced muscle invasive bladder cancer (T2-4) were determined using real-time Q-PCR. Analysis was performed on cDNA from 10 tumor specimens and each bar represents the mean from the 10 samples.(B) COS-7 cells were transiently transfected with empty pcDNA3.1/V5-His vector (lane 2, 6), pcDNA3.1/V5-His-TFAP2α isoform 1(lane 3, 7), isoform 2 (lane 4, 8) and isoform 3 (lane 5, 9). Western blot of 30 μg total protein lysate from non-transfected HU609 bladder cells (lane 1) and COS-7 transfected cells (lane 2-9) 48 h post transfection probed with anti TFAP2α antibody (lane 1-5) or anti-V5 antibody (lane 6-9).